/Engine/Plugins/FX/Niagara/Source/Niagara/Public/NiagaraRendererRibbons.h
bool Allocate ( [FRHICommandListBase](API\Runtime\RHI\FRHICommandListBase) & RHICmdList, uint32 NumElements, uint32 MaxElements, ERHIAccess InResourceState, bool bGpuReadOnly, EBufferUsageFlags AdditionalBufferUsage )